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What is an adjustable rate mortgage ?
 
An ARM mortgage, as the name suggests has an adjustable rate against which the mortgage payments are calculated. As a result your mortgage payments may go up or down throughout the life of your loan. The rate against which your mortgage is calculated is based upon a published market index which in many cases is a One-Year treasury bond index or our favorite the Cost Of Funds Index (COFI). The interest rate that applies to you is the sum of such an index and a margin which is generally set during your loan application process. So, for example, if the index is 7.5% and your margin is 2.5% then your rate is 10.0%. This rate is adjusted by your mortgage lender at every pre-determined interval which is known as the Adjustment Interval. So, a One-year ARM is said to have an Adjustment interval of once every year. In addition to such periodic adjustments, it is possible that the very first adjustment may occur earlier or later than all the other adjustments. For instance a one-year ARM mortgage may have the very first initial adjustment after 2 years of your taking out the mortgage loan, followed by an adjustment every once a year. Your initial interest rate is determined at the beginning of your loan process and may be different than the sum of the current index plus margin.
 
 

 

 


 

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